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Derek will return to the mountain exactly a year later and says he is more determined than ever to complete the challenge.

He said: “My non-summit of Aconcagua last January has made me so much more focused and determined to return and try again.

“The memories of that morning sitting at 6,500 metres are all still so vivid – the bitter cold, the wind chill, the spin drift, day breaking, taking shelter and trying to keep warm. My fingers and toes were tingling.